For years, pivot tables have been my go-to for almost every data summary task in Excel. Over time, I got pretty good at them, field lists, value settings, the whole ritual, but they never quite felt ...

A worksheet on identifying whether a given table of values represents a function. Answers are included. Are your maths students struggling to spot repeating inputs in tables of values? Take the ...

Say I can pass several commands to my program, and each command corresponds to a function. How can I call this function without a lot of if-else? To add a little seasoning, I also need to pass ...

A worksheet in which students are required to determine if a given relationship is a function or not. More precisely, they have to identify functions from sets of ordered pairs, tables of values, ...